javascript/test/reader.test.ts

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
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import { alloc } from '../packages/fury/lib/platformBuffer';
import { BinaryReader } from '../packages/fury/lib/reader';
import { BinaryWriter } from '../packages/fury/lib/writer';
import { describe, expect, test } from '@jest/globals';


describe('writer', () => {
    test('should uint8 work', () => {
        const writer = new BinaryWriter({});
        {
            writer.uint8(10);
            var ab = writer.dump();
            expect(ab.byteLength).toBe(1);
            expect(ab[0]).toBe(10);
            expect(writer.getCursor()).toBe(1);
        }

        {
            writer.uint8(256);
            var ab = writer.dump();

            expect(ab.byteLength).toBe(2);
            expect(ab[1]).toBe(0);
            expect(writer.getCursor()).toBe(2);
        }
    });
});


describe('reader', () => {

    test('should bufferRef work', () => {
        const bb = alloc(100);
        bb.write("hello", 0, 'latin1');
        const target = new Uint8Array(5);
        bb.copy(target, 0, 0, 5);
        expect([...target]).toEqual([ 104, 101, 108, 108, 111 ])

        const reader = new BinaryReader({});

        reader.reset(bb);
        const ref = reader.bufferRef(5);
        ref[0] = 0;
        bb.copy(target, 0, 0, 5);
        expect([...target]).toEqual([ 0, 101, 108, 108, 111 ])
    })
})